MY110477A - Cartesian multicarrier feedback - Google Patents

Cartesian multicarrier feedback

Info

Publication number
MY110477A
MY110477A MYPI94000166A MYPI19940166A MY110477A MY 110477 A MY110477 A MY 110477A MY PI94000166 A MYPI94000166 A MY PI94000166A MY PI19940166 A MYPI19940166 A MY PI19940166A MY 110477 A MY110477 A MY 110477A
Authority
MY
Malaysia
Prior art keywords
cartesian
combined
multicarrier feedback
multicarrier
feedback
Prior art date
Application number
MYPI94000166A
Inventor
Par Bergsten
Ulf Skarby
Kista Hedberg
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of MY110477A publication Critical patent/MY110477A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0483—Transmitters with multiple parallel paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2637—Modulators with direct modulation of individual subcarriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Optical Communication System (AREA)
  • Amplifiers (AREA)

Abstract

A SYSTEM FOR TRANSMISSION OF COMBINED, MULTI-CARRIER SIGNALS IS DISCLOSED WHEREIN COMBINER/FILTERS, COMMONLY CALLED COMBINERS (14), HAVE BEEN ELIMINATED. A CARTESIAN FEEDBACK LOOP (42) LINEARIZES THE SYSTEM AND THEREBY SUPPRESSES CARRIER FREQUENCY INTERMODULATION BY FEEDING BACK A PORTION OF THE COMBINED MULTI-CARRIER SIGNAL TO EACH CHANNEL DEVICE (30). (FIG. 3)
MYPI94000166A 1993-01-28 1994-01-21 Cartesian multicarrier feedback MY110477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/010,336 US5551070A (en) 1993-01-28 1993-01-28 Cartesian multicarrier feedback

Publications (1)

Publication Number Publication Date
MY110477A true MY110477A (en) 1998-05-30

Family

ID=21745263

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI94000166A MY110477A (en) 1993-01-28 1994-01-21 Cartesian multicarrier feedback

Country Status (14)

Country Link
US (1) US5551070A (en)
EP (1) EP0647374A1 (en)
JP (1) JP3253085B2 (en)
KR (1) KR100294177B1 (en)
CN (1) CN1034458C (en)
AU (1) AU670676B2 (en)
BR (1) BR9403896A (en)
CA (1) CA2132089A1 (en)
FI (1) FI944476A0 (en)
MX (1) MX9400663A (en)
MY (1) MY110477A (en)
NZ (1) NZ261182A (en)
TW (1) TW284941B (en)
WO (1) WO1994017599A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
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US5768693A (en) * 1995-02-28 1998-06-16 Telecommunications Equipment Corporation Method and apparatus for controlling frequency of a multi-channel transmitter
KR0155818B1 (en) * 1995-04-29 1998-11-16 김광호 Power distribution method and apparatus in multi-carrier transmitting system
FR2735636B1 (en) * 1995-06-16 1997-07-25 Thomson Csf METHOD AND DEVICE FOR OVER-SAMPLING AND FREQUENCY TRANSPOSITION OF A DIGITAL RADIO SIGNAL
US5894496A (en) * 1996-09-16 1999-04-13 Ericsson Inc. Method and apparatus for detecting and compensating for undesired phase shift in a radio transceiver
US6097712A (en) * 1997-06-20 2000-08-01 Nortel Networks Limited Multi-carrier CDMA communications systems
GB9715278D0 (en) 1997-07-18 1997-09-24 Cambridge Consultants Signal processing system
IT1294284B1 (en) * 1997-07-29 1999-03-24 Italtel Spa WIDE BAND RADIO TRANSMITTER FOR A SIGNAL CONSTITUTED BY A PLURALITY OF EQUIPPED DIGITALLY MODULATED CARRIERS
US6131016A (en) * 1997-08-27 2000-10-10 At&T Corp Method and apparatus for enhancing communication reception at a wireless communication terminal
IT1305710B1 (en) * 1998-12-11 2001-05-15 Itelco S P A METHOD FOR THE TRANSMISSION OF MORE BROADCAST TYPE SIGNALS
AU2163399A (en) 1998-12-24 2000-07-31 Nokia Networks Oy Multi-frequency transmitter using predistortion and a method of transmitting
SE515636C2 (en) * 2000-01-25 2001-09-17 Ericsson Telefon Ab L M Method and apparatus for controlling transmitted power in a telecommunication system
US8107901B2 (en) * 2001-08-20 2012-01-31 Motorola Solutions, Inc. Feedback loop with adjustable bandwidth
US7127211B2 (en) * 2002-02-21 2006-10-24 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for reduced intermodulation distortion in a radio transceiver
EP1361655A1 (en) * 2002-05-07 2003-11-12 Semiconductor Ideas to The Market (ItoM) BV Mirror suppression circuit in a quadrature demodulator
US7116726B2 (en) * 2002-08-12 2006-10-03 Cubic Corporation Method and apparatus for transferring multiple symbol streams at low bit-error rates in a narrowband channel
EP2517363A1 (en) * 2009-12-22 2012-10-31 Aeromechanical Services Ltd. Multiple satellite modem system using a single antenna

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5329008A (en) * 1976-08-30 1978-03-17 Nec Corp Supervision control uni t of radio transmitter output level
US4490684A (en) * 1983-01-03 1984-12-25 Motorola, Inc. Adaptive quadrature combining apparatus
US4560945A (en) * 1984-09-04 1985-12-24 Westinghouse Electric Corp. Adaptive feedforward cancellation technique that is effective in reducing amplifier harmonic distortion products as well as intermodulation distortion products
US4726071A (en) * 1984-12-31 1988-02-16 Orion Industries, Inc. Microprocessor controlled self-tuning resonant cavity and method
GB8629529D0 (en) * 1986-12-10 1987-01-21 Gen Electric Co Plc Radio transmitter arrangements
US5163181A (en) * 1988-10-21 1992-11-10 Harris Corporation Multiple rf signal amplification method and apparatus
JPH02143719A (en) * 1988-11-25 1990-06-01 Nec Corp Transmission power control system for multicarrier transmission equipment
GB9002788D0 (en) * 1990-02-08 1990-04-04 Marconi Co Ltd Circuit for reducing distortion produced by an r.f.power amplifier
US5140627A (en) * 1990-10-09 1992-08-18 Telefonaktiebolaget L M Ericsson Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system
US5134718A (en) * 1990-10-31 1992-07-28 Motorola, Inc. Fast phase shift adjusting method and device for linear transmitter
US5066923A (en) * 1990-10-31 1991-11-19 Motorola, Inc. Linear transmitter training method and apparatus
US5257415A (en) * 1991-03-20 1993-10-26 Fujitsu Limited Automatic transmission level control device
US5302914A (en) * 1992-10-20 1994-04-12 At&T Bell Laboratories Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems

Also Published As

Publication number Publication date
CA2132089A1 (en) 1994-07-29
WO1994017599A1 (en) 1994-08-04
BR9403896A (en) 1999-06-01
FI944476A (en) 1994-09-27
KR950701162A (en) 1995-02-20
AU670676B2 (en) 1996-07-25
CN1034458C (en) 1997-04-02
CN1102937A (en) 1995-05-24
TW284941B (en) 1996-09-01
FI944476A0 (en) 1994-09-27
JP3253085B2 (en) 2002-02-04
JPH07508151A (en) 1995-09-07
US5551070A (en) 1996-08-27
AU5981694A (en) 1994-08-15
KR100294177B1 (en) 2001-09-17
EP0647374A1 (en) 1995-04-12
MX9400663A (en) 1994-08-31
NZ261182A (en) 1996-07-26

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